There are lots of posts on SVS, and until today I hadn't really considered them. But a Cylindrical sub may be just the ticket to squeeze in the space behind my TDM23F front speakers & stands. I've long accepted that my KEF subs are not great, and for music they're pretty poor. But I've finally decided that they've got to go, and I want something very much more capable, especially for music. How good are these cylindrical SVS subs higher up the frequency range? Everyone talks about power and depth, but given that my speakers are THX designs, any sub needs to be tuneful right up to 80Hz. So, cut to the chase.... an SVS or a B&W with my KEF THX speakers?